What makes Houston so vulnerable to serious floods?
by Adam Gabbatt from on (#30H8C)
The size of storm Harvey is unusual - but rapid expansion, poor infrastructure and a distinctive topography have played a role in the devastating impact
Flooding is nothing new to Houston residents. Over the past five decades no other urban area in the country has experienced as many casualties and property loss from flooding.
Related: Tropical storm Harvey: Texas's entire National Guard activated - live
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